A Very Unusual Tube Amp Problem......and Repair

While working on a Davis 106 P.A. amp, I encountered a serious problem which is quite uncommon in guitar amps. In addition, the cause of the problem.....and its resolution.....were equally unusual. It's a fairly short video, and I think/hope you will enjoy the progressive diagnosis and repair. See if you can predict the cause of the problem.
Please subscribe if you have not already done so. Rusty and I sincerely appreciate your time and interest.

[@2right4words]

I love the Precision and Clarity of your videos!

[@ix-Xafra]

This gem came up in my Ewetube feed at 4am.

[@audiotechlabs4650]

Wow Back to Back gems! These videos give me such encouragement. Thankz

[@jimlabos]

Thanks for taking us on this journey with you. So much to learn from you.

[@kardRatzinger]

Usually I hear the term "motorboating" used to describe something completely different than an amp failure :)

[@ionizerusa]

Dear Uncle Doug, you bring back a multiple dose of memories for me. Many thanks!

[@Finom1]

This is the best way to spend a Saturday watch Uncle Doug & Rusty work their magic. Thank you for teaching us!!!

[@davida1hiwaaynet]

Excellent repair. Never give up on anything - locating and repairing the transformer problem is always so satisfying.

[@jasonbrindamour903]

Cheers to Rusty and yourself sir...A big thanks for not being afraid to share this information with us in a video format. I greatly appreciate your knowledge.

[@supermist100]

Nice to see Rusty is still with us! Thanks 4 your videos!

[@kevinbeckenham3872]

Thanks for a great documentary on motor boating problem that happen from to time on valve amplifier. Keep up the good works you do amplifiers.

[@harrisonhein1287]

So happy to see you and Rusty making videos again. You've helped me heaps with learning and fixing amps

[@edwardhannigan6324]

Hi Doug, still trawling through your videos in my quest for electronic knowledge. Unusual noise and great fix. It's amazing all the things that can go wrong in an amp circuit. I know this is one of your older videos, but enlightening non the less. Good to see Rusty' enthusiasm brimming over. Look forward to anything new in the pipeline..Thanks again for all this knowledge..Ed..U.K..😀

[@leftyfusion88]

Great videos for someone like me who is trying to absorb how this stuff all works. Thanks again.

[@waynekozak1462]

Hey Uncle Doug!

[@vhm14u2c]

Amazing TS work on finding the issue with the open winding on the output xformer. Thanks for sharing!

[@aaronjohnson8211]

You're truly the king of amp repair

[@vminator]

You sir have been a huge source of information for us all. Because of watching all your videos over and over again, I am now on my third scratch built tube amplifier! I love the sound so much I sold all my other amps! I hope your shop assistants and yourself are doing great. Keep the videos coming!!

[@marviosantos]

HA! I actually "guessed" the problem before you got to the conclusion, and I only even mention it because this is a credit to you sir, for teaching me all I know about tube amps! Thanks for another great video!

[@daveb9370]

Hey Uncle Doug, great video and, once again, glad Rusty solved the mystery! Very educational, I learn alot from watching you guys work. I hope Rusty isn't pushing you too hard. My Husky Igloo pushes me hard sometimes, but he says it's for my own good, and I guess he's right. Have a great day and keep the great videos coming!